Refactor the devserver to make it easier to control caching

chrome/common/extensions/docs/server2/sidenav_data_source_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import sys
 import unittest
 
 from compiled_file_system import CompiledFileSystem
 from in_memory_object_store import InMemoryObjectStore
 from local_file_system import LocalFileSystem
 from sidenav_data_source import SidenavDataSource
 
 class SamplesDataSourceTest(unittest.TestCase):
   def setUp(self):
     self._base_path = os.path.join(sys.path[0],
                                    'test_data',
                                    'sidenav_data_source')
-    self._cache_factory = CompiledFileSystem.Factory(
-        LocalFileSystem(self._base_path),
-        InMemoryObjectStore('fake_branch'))
+    self._compiled_fs_factory = CompiledFileSystem.Factory(
+        LocalFileSystem(self._base_path))
 
   def _CheckLevels(self, items, level=2):
     for item in items:
       self.assertEqual(level, item['level'])
       if 'items' in item:
         self._CheckLevels(item['items'], level=level + 1)
 
   def testLevels(self):
-    sidenav_data_source = SidenavDataSource.Factory(self._cache_factory,
+    sidenav_data_source = SidenavDataSource.Factory(self._compiled_fs_factory,
                                                     self._base_path).Create('')
     sidenav_json = sidenav_data_source.get('test')
     self._CheckLevels(sidenav_json)
 
   def testSelected(self):
     sidenav_data_source = SidenavDataSource.Factory(
-        self._cache_factory,
+        self._compiled_fs_factory,
         self._base_path).Create('www.b.com')
     sidenav_json = sidenav_data_source.get('test')
     # This will be prettier once JSON is loaded with an OrderedDict.
     for item in sidenav_json:
       if item['title'] == 'Jim':
         self.assertTrue(item.get('child_selected', False))
         for next_item in item['items']:
           if next_item['title'] == 'B':
             self.assertTrue(next_item.get('selected', False))
             return
     # If we didn't return already, we should fail.
     self.fail()
 
 
 
 if __name__ == '__main__':
   unittest.main()